/**
 * Copyright (c) 2016-2019 人人开源 All rights reserved.
 *
 * https://www.renren.io
 *
 * 版权所有，侵权必究！
 */

package com.pz.gulimall.common.utils;

import com.alibaba.fastjson2.JSON;
import com.pz.gulimall.common.exception.BizCodeEnum;
import com.pz.gulimall.common.to.SkuHasStockTo;
import org.apache.http.HttpStatus;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * 返回数据
 *
 * @author Mark sunlightcs@gmail.com
 */
public class R extends HashMap<String, Object> {
	private static final long serialVersionUID = 1L;
	
	public R() {
		put("code", 0);
		put("msg", "success");
	}
	
	public static R error() {
		return error(HttpStatus.SC_INTERNAL_SERVER_ERROR, "未知异常，请联系管理员");
	}
	
	public static R error(String msg) {
		return error(HttpStatus.SC_INTERNAL_SERVER_ERROR, msg);
	}

	public static R error(BizCodeEnum err) {
		return error(err.getCode(), err.getMsg());
	}
	
	public static R error(int code, String msg) {
		R r = new R();
		r.put("code", code);
		r.put("msg", msg);
		return r;
	}

	public static R ok(String msg) {
		R r = new R();
		r.put("msg", msg);
		return r;
	}

	public static R ok(int code, String msg) {
		R r = new R();
		r.put("code", code);
		r.put("msg", msg);
		return r;
	}
	
	public static R ok(Map<String, Object> map) {
		R r = new R();
		r.putAll(map);
		return r;
	}
	
	public static R ok() {
		return new R();
	}

	public static R okData(Object data) {
		return ok().put("data", data);
	}

	public R put(String key, Object value) {
		super.put(key, value);
		return this;
	}

	public Integer getCode(){
		return (Integer) this.get("code");
	}

	public String getMsg(){
		return (String) this.get("msg");
	}

	/**
	 * 获取 key 为 data 的对象
	 * @param clazz 对象类型
	 * @param <T>
	 * @return
	 */
	public <T> T getData(Class<T> clazz){
		if(this.get("data") == null || JSON.toJSONString(this.get("data")).isEmpty()){
			return null;
		}
		return JSON.parseObject(JSON.toJSONString(this.get("data")), clazz);
	}

	/**
	 * 获取 key 为 data 的对象集合
	 * @param type 对象类型
	 * @param <T>
	 * @return
	 */
	public <T>List<T> getDataArray(Class<T> type){
		if(this.get("data") == null || JSON.toJSONString(this.get("data")).isEmpty() || JSON.toJSONString(this.get("data")).equals("[]")){
			return null;
		}
		return JSON.parseArray(JSON.toJSONString(this.get("data")), type);
	}

	public <T>List<T> getDataArray(Class<T> type, String fieldName){
		if(this.get(fieldName) == null || JSON.toJSONString(this.get(fieldName)).isEmpty()){
			return null;
		}
		return JSON.parseArray(JSON.toJSONString(this.get(fieldName)), type);
	}
}
